package com.atguigu.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {
    public String paymentInfo_OK(Integer id){
        return "线程池:"+Thread.currentThread().getName()+"paymentInfo_OK,id:"+id+"\t"+"O(∩_∩)O哈哈~";
    }

    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler" , commandProperties = {
            @HystrixProperty(name="execution.isolation.thread.timeoutInMilliseconds", value = "3000")
    })
    public String paymentInfo_TimeOut(Integer id){
        try { TimeUnit.MILLISECONDS.sleep(3000); } catch (InterruptedException e) { e.printStackTrace(); }
        return "线程池:"+Thread.currentThread().getName()+"id:"+id+"\t"+"^_^,耗时5s";
    }

    public String paymentInfo_TimeOutHandler(Integer id){
        return "线程池:"+Thread.currentThread().getName()+" 服务超时或出现了一点异常 o(╥﹏╥)o";
    }

    //=====================服务熔断
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",commandProperties = {
            //该属性全都来自于HystrixCommandProperties抽象类
            @HystrixProperty(name = "circuitBreaker.enabled",value = "true"),// 是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "10"),// 请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds",value = "10000"), // 时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "60"),// 失败率达到多少后跳闸
            //举例: 10s时间内的窗口期 10次请求失败6次会开启断路器
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id){
        if (id<0){
            throw new RuntimeException("*****id 不能为负数");
        }
        String serialNumber= IdUtil.simpleUUID();
        return Thread.currentThread().getName()+"\t"+"调用成功,流水号: "+serialNumber;
    }
    //该方法用来给上传方法兜底的.(上述方法出现超时,异常. 会执行该方法 服务降级)
    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id){
        return "id不能为负数, 请稍后再试,o(╥﹏╥)o id:"+id;
    }

}
